<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <label for="agree">
            <!-- 没有value配合v-model的话，默认的是bool值 -->
            <input type="checkbox" id="agree" v-model="isAgree">您是否同意此协议?
        </label>
        <h2>您选择的是{{isAgree}}</h2>
        <button :disabled="!isAgree">下一步</button>
    </div>
    <script src="../vue.js"></script>
    <script>
        const app = new Vue({
            el: "#app",
            data: {
                isAgree: false
            }
        })
    </script>
</body>
</html>